Car truck



H. D. TAYLOR May 6, 1930.

CAR TRUCK Filed June 8, 1928 2 Sheets-Sheet 1 mm mm IHA R lily/(am:

' J flown/a D. Taylor M /W w ws.

H. D. TAYLOR May 6, 1930.

CAR TRUCK Filed June 8, 1928 2 Sheets-Sheet 2 Patented May 6, 1930UNITED STATES PATENT OFFICE HOWARD I). TAYLOR, F NEW YORK, N. Y.,ASSIGNQR TO FLEXIBLE TRUCK GOBPO-r RATION, OF PHILADELPHIA,PENNSYLVANIA, A CORPORATION OF DELAWARE CAR TRUCK Application filed June8, 1923. Serial No. 283,806.

The invention relates to car trucks of the type set forth in the UnitedStates Letters Patent No. 1,594,576 and No. 1,594,644, issued to meAugust 3, 1926, and in which carriers for the truck bolster arejournaled in large bearing openings in the side frames, to permit therelative rocking movement of the side frames as the truck passes overirregularities of the track. To provide for the heavy loads imposed uponthe truck in modern practice, and particularly to provide space for asufficient number of springs, it is desirable that the carriers and thebearing openings of the side frames in which the carriers are journaled,shall be quite large. But the height of the central portion of the sideframe is lim ited by the standard regulations with respect to the heightof the truck center and the required track clearance.

In accordance with the present invention the large cylindrical bearingopenings in the central portions of the side frames and the carrierrings journaled therein are provided with flattened or truncated upperportions that are spaced apart to permit the limited, relative rockingmovement of the side frames.

The invention ishereinafter more fully set forth, is illustrated in thepreferred form in the accompanying drawings and is particularly definedin the appended claims.

In the drawings:

Fig. l is a partial plan view of the improved truck. l

Fig. 2 is a side elevation thereof.

' Fig. 3 is a central transverse section, and

Fig. 4 is a detail section on line H of Fig. 3. i

The side frames are preferably substantially similar in construction tothat shown in the co-pending application filed by me in the UnitedStates Patent Office March 18, 1926, Serial No. 95,529. Each side framecomprises upper and lower or compression and tension members 10 and 11integrally connected at their ends and provided with integral journalboxes 12. Intermediate the center and ends of the truck the upper andlower members .are connected by struts 13. Inner and outer spaced sidewalls of the side frame constitute the sides of the members 10, 11 and13, and

these side walls are connected by transverse webs 14, 15 and 16, whichextend respectively along the upper edges of the upper and lower members10 and 11 and along the lower edge of the lower tension member. The sidewalls are also connected by a continuous transverse web 17 which extendsabout and forms the central bearing opening 18 of the truck side frame.

The bearing opening thus formed is substantially cylindrical throughoutthe greater portion of its periphery, but is provided with a flattenedor truncated upper portion and this part 19 of the transverse web ishorizontal and substantially straight. The trans verse web 14 at theupper edge of the compression member 10 is also flat and straight at itscentral portion and together with the web 19 and the side walls form aclosed box section for thecompression member above the central bearingopening. The web 17 merges into the central arc-shaped portion of theweb 15 at the upper edge of the lower tension member, and together withthe central portion of the web 16 and side walls of this member form aclosed box section for the tension member below the bearing opening. Theside frame is thus provided with a central portion of stoutconstruction, but it is particularly noted that the box sections of thecentral portions ofthe compression and tension members are of contractedheight and the central portion of the upper member is flattened so thatthe bearing opening can be correspondingly increased in size.

As set forth in the prior application referred to, the ends of thecompression member extend over and merge into the top walls of theintegral journal boxes, and the ends of the tension member merge intothe upper portion of the inner side walls of the boxes, the arrangementbeing such that the side frames have double box sections at pointsadjac'ent the journal boxes. Preferably, the transverse Webs 16 at thelower edge of the tension member are provided with openings 20 betweenthe central and end portions of the side frame, so that these parts ofthe tension member and also the corresponding parts of the uppercompress on member are of inverted U-shape in section. ,All of theopenings of the side frame are provided at their edges with stiffeningbeads 21.

The carrier rings 22 which support the bolster and bolster springs, likethe bearing openingsof the side frames in which they are journaled, arecylindrical throughout the greater portion of their peripheries, but areprovided with flattened or truncated upper portions which are spacedfrom the flattened portionof the bearing opening to permit the rockingmovement of the side frames. In the preferred form shown, the upperportion 23 which extends between the, sides of each carrier ring, isslightly arched to provide suflicient clearance for the correspondinglyshaped end of the truck bolster. As set forth in the prior patents andapplication referred to, the carriers are interlocked'with the sideframes by means of keys 24 arranged within pockets formed by walls 25extending between the opposite sides of the transverse web 17 andtransverse flanges 26 which extend between the side walls of the struts13. Bolts r the inner ends of the keys extend through slots in theopposite sides of the carrier rings, the length of whichis such as topermit the limited rocking movement of the side frames. The carrier.rings are also provided at their lower portions with sills or springplank seats 28 which project laterally beyond the other portions of thecarriers. At their upper inner side portions the carriers are providedwith guides 29 which co-operate with lugs 30 on the ends of the truckbolster 31 to interlock the carrier and bolster, whilepermitting therelative vertical movement of these parts.

The bolster 31 is preferably similar in construction to that set forthin United States Letters Patent No. 1,594,645, issued to me August 3,1926. It comprises top, bottom, and side walls and end portions 32 ofcontracted height and each having an arched upper wall and asubstantially horizontal lower wall forming a spring seat. The bol 'steris also provided with stiffening flanges 33 which project downwardlybelow the spring seats at its ends. I

The spring plank 34 rests at its ends upon the sills 28 of the carriersand is provided with ofl'sets which interlock with openings in thesills. A set of springs 35 are mounted between plates 36 and areinterposed between the end of the springplank and the end of thebolster, the plates 36 being preferably provided with offsets 37 whichinterlock with recesses formed in the spring-engaging portions or seatsof the spring plank and bolster. The arrangement is such that, as setforth in the prior patents and application referred'to, the ends of thebolster can be inserted through the lower portions of the openngs in thecarrier rings and then lifted to interlock with'th'e guides 29, the setsof springs serving to hold the bolster and spring plank detachablyinterlocked with the carriers. Preferably, the central portion of thespring plank is deflected downwardly and it is provided at its sideedges with upturned stiffening flanges 38. Preferably, also, linerstrips 39 formed of hard, non-ferrous metal, such as spring brass, areinterposed between the surfaces of the carrier rings and the hearingopenings in the side frame.

The improved construction provides ample space for a large number ofsprings within the carriers such as is required for heavy loads. At thesame time the height of the central portions of the side frames is keptwithin the required limits and the side frames are free to rock invertical planes without straining the other parts of the truck.

Obviously, changes may be made in the details set forth withoutdeparture from the scope of the appended claims.

Features of the present invention are more broadly claimed in acompanion application filed by me in the United States Patent Office onJune 8, 1928, Serial No. 283,805.

I claim as my invention:

1. A car truck comprising side frames having enlarged central bearings,chambered carriers journaled in said bearings and adapted to receive andinterlock with the bolster ends and receive and support the bolstersprings, the bearings and carriers having truncated upper portionspermitting the relative rocking movement of the side frames.

2. A car truck side frame having central portions forming an enlargedbearing, a carrier journaled in said bearing and interlocked therewithand adapted to receive and interlock with the bolster end and receiveand support the bolster springs, the bearing and carrier havingtruncated upper portions spaced to permit the limited rocking movementof the side frame, substantially as described.

3. A car truck side frame having central portions forming an enlargedbearing, a carrier ring journaled in said bearing and having a bolsterreceiving opening, bolster guides at the upper side portions of theopening and a spring supporting sill at the lower portion thereof, andmeans interlocking the carrier ring and side frame, the bearing andcarrier greater portions of their peripheries and truncated at theirupper portions, and keys fixed to the side frames and engaging elongatedslots in opposite sides of the carriers, said truncated portions and thekey and slot connections being arranged to permit the limited rockingmovement of the side frames. 5. A car truck side frame having centralportions forming an enlarged opening pr0- vided with a cylindricalbearing'surface and truncated at its upper portion, and a one piececarrier, chambered to receive the end of the truck bolster andbolster-supporting springs, journaled within said bearing andinterlocked with said side frame and arranged to permit the limitedrocking movement of the side frame relatively to the carrier,substantially as described.

6. A car truck side frame having an enlarged central part flattened atits upper portion and rounded at its lower portion and provided with acorrespondingly shaped opening having a cylindrical bearing surface anda truncated upper portion, a carrier ring having bolster guides and aspring supporting sill journaled in said bearing opening and interlockedwith the side frame and having a truncated upper portion spaced from thetruncated portion of the bearing, substantially as described.

HOWARD D. TAYLOR.

